Patent US2742353A successfully refreshed from Google Patents.
US2742353A
Expired / Lapsed
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Iron ore reduction process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-11-01
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Granted: 1956-04-17
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Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Henry J Ogorzaly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:33
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PROCESS FOR REDUCING OXIDIC ORE OF THE IRON ORE TYPE WHICH COMPRISES INTRODUCING A FINELY DIVIDED ORE AND AN EXCESS OF FINELY DIVIDED CARBONACEOUS MATERIAL INTO A REDUCTION ZONE, INTRODUCING A GAS COMPRISING A MIXTURE OF CO2 AND CO INTO THE REDUCTION ZONE AT A SUFFICIENTLY HIGH VELOCITY IN THE RANGE OF ABOUT 0.5 TO 5 FEET PER SECOND TO FLUIDIZE AND MAINTAIN IN TURBULENT SUSPENSION THE FINELY DIVIDED SOLIDS IN THE REDUCTION ZONE, REMOVING A MIXTURE OF RESULTING REDUCED METAL AND CARBON FROM THE REDUCTION ZONE TO A SEPARATING ZONE, INTRODUCING A NON-OXIDIZING GAS AT LOW VELOCITY IN THE RANGE OF ABOUT 0.02 TO 0.5 FEET PER SECOND INTO A BOTTOM PORTION OF THE SEPARATING ZONE AND PASSING IT UPWARDLY THROUGH SAID MIXTURE, THEREBY CAUSING THE SEPARATION OF SAID MIXTURE INTO A FLUIDIZED NON-TURBULENT UPPER LAYER OF CARBON AND A FLUIDIZED NONTURBULENT LOWER LAYER OF METAL, BURNING A SUBSTANTIAL POR-
Claim 2
Dependent Claim
152 words
A PROCESS FOR REDUCING OXIDIC ORE OF THE IRON ORE TYPE WHICH COMPRISES INTRODUCING A FINELY DIVIDED ORE AND AN EXCESS OF FINELY DIVIDED CARBONACEOUS MATERIAL INTO A REDUCTION ZONE, INTRODUCING A GAS COMPRISING A MIXTURE OF CO2 AND CO INTO THE REDUCTION ZONE AT A SUFFICIENTLY HIGH VELOCITY IN THE RANGE OF ABOUT 0.5 TO 5 FEET PER SECOND TO FLUIDIZE AND MAINTAIN IN TURBULENT SUSPENSION THE FINELY DIVIDED SOLIDS IN THE REDUCTION ZONE, REMOVING A MIXTURE OF RESULTING REDUCED METAL AND CARBON FROM THE REDUCTION ZONE TO A SEPARATING ZONE, INTRODUCING A NON-OXIDIZING GAS AT LOW VELOCITY IN THE RANGE OF ABOUT 0.02 TO 0.5 FEET PER SECOND INTO A BOTTOM PORTION OF THE SEPARATING ZONE AND PASSING IT UPWARDLY THROUGH SAID MIXTURE, THEREBY CAUSING THE SEPARATION OF SAID MIXTURE INTO A FLUIDIZED NON-TURBULENT UPPER LAYER OF CARBON AND A FLUIDIZED NONTURBULENT LOWER LAYER OF METAL, BURNING A SUBSTANTIAL POR-
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |